Elbow guard



FIG. 1 is a front, top and right side perspective view of an elbow guard showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a right side elevational view, the left side being substantially a mirror image thereof;

FIG. 4 is a bottom plan view; and

FIG. 5 is a rear elevational view. 

The ornamental design for an elbow guard, as shown and described. 